公开(公告)号：US20220239308A1

公开(公告)日：2022-07-28

申请号：US17160718

申请日：2021-01-28

申请人： Analog Devices International Unlimited Company

发明人： Roberto S. MAURINO

IPC分类号： H03M1/44 ,  G06G7/186 ,  H03M3/00 ,  H03H19/00

摘要： Devices and methods that aim to improve flicker noise rejection in switched-capacitor (SC) integrators are disclosed. An example SC integrator includes a first and a second sampling capacitors, an amplifier, an integrating capacitor, coupled at least to an output of the amplifier, and a switching arrangement. By adding (i.e., integrating in the integrating capacitor) sign-inverted samples of a flicker noise of the amplifier at every clock cycle of a master clock and by keeping the time distance/delay between those samples relatively small regardless of the master clock frequency, such a SC integrator may provide improvements in terms of rejecting the flicker noise of the amplifier.